function trim(sString)
{
  while (sString.substring(0,1) == ' ') {
	sString = sString.substring(1, sString.length);
  }
  while (sString.substring(sString.length-1, sString.length) == ' ') {
	sString = sString.substring(0,sString.length-1);
  }
  return sString;
}